dist/ember-testing.js in ember-source-2.12.0.beta.1 vs dist/ember-testing.js in ember-source-2.12.0.beta.2

@@ -4,13 +4,14 @@
  * @copyright Copyright 2011-2017 Tilde Inc. and contributors
  *            Portions Copyright 2006-2011 Strobe Inc.
  *            Portions Copyright 2008-2011 Apple Inc. All rights reserved.
  * @license   Licensed under MIT license
  *            See https://raw.github.com/emberjs/ember.js/master/LICENSE
- * @version   2.12.0-beta.1
+ * @version   2.12.0-beta.2
  */
 
 var enifed, requireModule, Ember;
+var mainContext = this; // Used in ember-environment/lib/global.js
 
 (function() {
   var isNode = typeof window === 'undefined' &&
     typeof process !== 'undefined' && {}.toString.call(process) === '[object process]';